qmk_firmware/keyboards/dasky/reverb/graphics/display.c

// Copyright 2023 Dasky (@daskygit)
// SPDX-License-Identifier: GPL-2.0-or-later

#include "display.h"
#include "graphics/splash.qgf.h"
#include "graphics/reverb.qgf.h"
#include "graphics/robotomono20.qff.h"
#include <stdio.h>
#include <math.h>

static painter_image_handle_t reverb_logo;
static deferred_token         display_task_token;
static uint32_t               key_pressed_count = 0;

static uint8_t reverb_surface_fb[SURFACE_REQUIRED_BUFFER_BYTE_SIZE(240, 240, 16)];

painter_device_t      reverb_surface;
painter_device_t      reverb_display;
painter_font_handle_t roboto_font;

uint32_t display_task_callback(uint32_t trigger_time, void *cb_arg) {
    display_task_kb();
    return 100;
}

void display_init_kb(void) {
    reverb_display = qp_gc9a01_make_spi_device(240, 240, DISPLAY_CS, DISPLAY_DC, DISPLAY_RST, 2, 0); // always init display
    qp_init(reverb_display, QP_ROTATION_0);
    roboto_font    = qp_load_font_mem(font_robotomono20);
    reverb_surface = qp_make_rgb565_surface(240, 240, reverb_surface_fb);
    qp_init(reverb_surface, QP_ROTATION_0);
    if (!display_init_user()) {
        return;
    }
    painter_image_handle_t splash_image;
    splash_image = qp_load_image_mem(gfx_splash);
    reverb_logo  = qp_load_image_mem(gfx_reverb);
    qp_drawimage(reverb_display, 0, 0, splash_image);
    qp_flush(reverb_display);
    qp_close_image(splash_image);
    display_task_token = defer_exec(2000, display_task_callback, NULL);
}

__attribute__((weak)) bool display_init_user(void) {
    return true;
}

void display_task_kb(void) {
    if (!display_task_user()) {
        return;
    }
    static bool     first_draw             = true;
    static uint32_t last_timer             = 0;
    static uint32_t last_wpm               = UINT32_MAX;
    static uint32_t last_scan_rate         = 0;
    static uint32_t last_key_pressed_count = UINT32_MAX;
    static uint8_t  last_hue               = 0;
    static uint8_t  last_sat               = 0;
    static uint8_t  last_val               = 0;
    bool            rgb_redraw             = false;

    if (first_draw) {
        qp_rect(reverb_display, 0, 0, 239, 239, 0, 0, 0, true);
        first_draw = false;
    }

    char buffer[64] = {0};

    if (last_hue != rgb_matrix_get_hue() || last_sat != rgb_matrix_get_sat() || last_val != rgb_matrix_get_val()) {
        last_hue = rgb_matrix_get_hue();
        last_sat = rgb_matrix_get_sat();
        last_val = rgb_matrix_get_val();
        qp_drawimage_recolor(reverb_surface, 60, 40, reverb_logo, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), 0, 0, 0);
        rgb_redraw = true;
    }

    if (rgb_redraw || last_scan_rate != get_matrix_scan_rate()) {
        snprintf(buffer, sizeof(buffer), "Scan Rate %ld", get_matrix_scan_rate());
        int16_t width = qp_textwidth(roboto_font, buffer);
        qp_line(reverb_surface, 17, 101, 220, 101, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128));
        qp_rect(reverb_surface, 16, 125 - roboto_font->line_height, 221, 125, 0, 0, 0, true);
        qp_drawtext_recolor(reverb_surface, (120 - (width / 2)), (125 - roboto_font->line_height), roboto_font, buffer, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), 0, 0, 0);
        qp_line(reverb_surface, 16, 126, 221, 126, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128));
        last_scan_rate = get_matrix_scan_rate();
    }
    if (rgb_redraw || last_key_pressed_count != key_pressed_count) {
        snprintf(buffer, sizeof(buffer), "Keys Pressed");
        int16_t width = qp_textwidth(roboto_font, buffer);
        qp_rect(reverb_surface, 30, 150 - roboto_font->line_height, 209, 150, 0, 0, 0, true);
        qp_drawtext_recolor(reverb_surface, (120 - (width / 2)), (150 - roboto_font->line_height), roboto_font, buffer, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), 0, 0, 0);
        snprintf(buffer, sizeof(buffer), "%ld", key_pressed_count);
        width = qp_textwidth(roboto_font, buffer);
        qp_rect(reverb_surface, 30, 172 - roboto_font->line_height, 173, 172, 0, 0, 0, true);
        qp_drawtext_recolor(reverb_surface, (120 - (width / 2)), (172 - roboto_font->line_height), roboto_font, buffer, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), 0, 0, 0);
        qp_line(reverb_surface, 30, 173, 209, 173, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128));
        last_key_pressed_count = key_pressed_count;
    }
    if (rgb_redraw || last_wpm != get_current_wpm()) {
        snprintf(buffer, sizeof(buffer), "WPM %d", get_current_wpm());
        int16_t width = qp_textwidth(roboto_font, buffer);
        qp_rect(reverb_surface, 56, 200 - roboto_font->line_height, 184, 200, 0, 0, 0, true);
        qp_drawtext_recolor(reverb_surface, (120 - (width / 2)), (200 - roboto_font->line_height), roboto_font, buffer, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), 0, 0, 0);
        qp_line(reverb_surface, 56, 201, 184, 201, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128));
        last_wpm = get_current_wpm();
    }

    if (rgb_redraw || timer_elapsed(last_timer) >= 1000) {
        static uint8_t seconds = 0;
        static uint8_t x       = 0;
        static uint8_t y       = 0;
        if (x && y) {
            qp_circle(reverb_surface, x, y, 4, 0, 0, 0, true);
        }
        double radians = 0.10471975511966 * seconds;
        x              = (110 * cos(radians)) + 119;
        y              = (110 * sin(radians)) + 119;
        qp_circle(reverb_surface, x, y, 4, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), true);
        qp_circle(reverb_surface, 119, 119, 105, rgb_matrix_get_hue(), rgb_matrix_get_sat(), MAX(rgb_matrix_get_val(), 128), false);
        if (seconds == 59) {
            seconds = 0;
        } else if (timer_elapsed(last_timer) >= 1000) {
            last_timer = timer_read32();
            seconds++;
        }
    }

    qp_surface_draw(reverb_surface, reverb_display, 0, 0, rgb_redraw);
}

__attribute__((weak)) bool display_task_user(void) {
    return true;
}

void display_key_counter(void) {
    if (key_pressed_count == UINT32_MAX) {
        key_pressed_count = 0;
    }
    key_pressed_count++;
}